The Storm Wolf: Gathering Clouds - Spouse
"more precisely, 'non-monogamy mating systems' were quite common," i replied, rubbing my temples to stifle the urge to smack him. "like harems? the kind emperors had?"
Fumigantlocology Compendium
Leo, on the other hand, at least as we see him in echo, isn't capable of handling even, like, entry-level non-monogamy.